Mark Cuban was just a kid from Pittsburgh when he started lugging trash bags around the neighbourhood, knocking on doors. Twelve years old and broke, he figured out something important pretty quickly—when he got pumped up about those garbage bags, people would pull out their wallets and buy them.
That same kid now sits on Shark Tank, picking apart business pitches like he's done it his whole life. Because he has. Cuban didn't luck into his money.
